
PLUG
FUNCTION
PINS
VOLTAGE
RESISTANCE
X1
Pump (PWM) pulse-width modulation
1 - 2
0.6 – 4.9v DC
X2
Water flow sensor
No demand
1 – 2
4v DC
1 – 3
0v DC
2 - 3
4v DC
Water flow sensor
DHW demand
1 – 2
4v DC
1 – 3
1v DC
2 – 3
2v DC
Link
4 - 5
0Ω
x4
Flow sensor T1
1 – 2
10KΩ@ 25°C
Return sensor T2
3 - 4
10KΩ@ 25°C
x5
ATAG BUS OpenTherm controller / room thermostat option
Blue (BUS)
34v DC
On / Off room thermostat volt free / timer option
Black (On / Off)
External timer CH option
White (CH timer)
External timer HW option
White (HW timer)
DHW cylinder sensor
Yellow (DHW)
10KΩ@ 25°C
Outside sensor T4 option
Peach (Out)
1KΩ@ 25°C
X6
Fan Control
X7
DHW sensor T3
8 – 9
10KΩ@ 25°C
Water pressure sensor P1 (@ + 1.0bar)
5 – 6
32v DC
5 – 7
22v DC
6 - 7
11v DC
X8
230v Power supply
1 – 2
230v
230v External timer option
4 – 5
230v
X9
230v control
1 – Neutral
230v
12.4
2 – Neutral
230v (SWL in)
X10
DHW on
CH on
1 – 2
230v
14v
1 – 3
30v
230v
2 – 3
230v
230v
X11
Fan
1 – 2
230v
Neutral
4
X12
Gas valve
1 - 2
100v
Spark generator (ignition)
3 - 4
230v
Ionisation probe
5
X13
Service connector
X17
Earth
E
N
L
SwL
230V out
230V Control
COLOUR
DESCRIPTION
Peach
ATAG outside sensor (1KΩ@ 25°C)
Yellow
DHW cylinder sensor (Used with 3 port diverter kit on system boiler)
White
(DHW)
ATAG programmer for DHW timer
White (CH)
ATAG programmer for CH timer
Black
On / Off room thermostat volt free / timer option
Blue
ATAG BUS OpenTherm controller / room thermostat option
Volt free
connections
DO NOT CONNECT 230V
25
Содержание BC100124
Страница 1: ...Appliance Technical Guide SERVICE ENGINEER EDITION ...
Страница 24: ...PCB electrical diagram LMU 24 ...
Страница 35: ...Notes 35 ...